We had reached the Canon on the second level or edge of the great gulf. Above and around us rose a wall of 2000 feet and below us a vast chasm 2500 feet in perpendicular depth and 1/2 a mile wide.  -   Thomas Moran     Quotes
We had reached the Canon on the second level or edge of the great gulf. Above and around us rose a wall of 2000 feet and below us a vast chasm 2500 feet in perpendicular depth and 1/2 a mile wide. Thomas Moran